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Microchip Technology AT25128AW-10SU-1.8
- Part No.:
- AT25128AW-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT25128AW-10SU-1.8.pdf
- Description:
- IC EEPROM 128KBIT SPI 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,875
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Product details
Overview
AT25128AW-10SU-1.8 from Microchip Technology (formerly Atmel) is a 128 Kbit SPI serial EEPROM organized as 16,384 × 8 bits, operating from 1.8 V to 5.5 V, supporting 20 MHz clock rate at 5 V, and featuring 64-byte page write, hardware/software write protection, and industrial temperature range (−40°C to +85°C). It serves as nonvolatile data storage in microcontroller-based systems requiring low-voltage operation and robust data retention.
For engineers reviewing the AT25128AW-10SU-1.8 datasheet, AT25128AW-10SU-1.8 pinout, AT25128AW-10SU-1.8 application, or AT25128AW-10SU-1.8 equivalent, key selection considerations include its 1.8 V–5.5 V supply compatibility, 8-lead SOIC package (8S2), SPI Mode 0/3 support, block write protection granularity (1/4, 1/2, or full array), and 1 million write cycles endurance.
Technical Context
The AT25128AW-10SU-1.8 implements a synchronous serial peripheral interface (SPI) with dedicated SI/SO pins, operates exclusively as a slave device, and uses MSB-first transmission with op-code–driven command execution (e.g., WREN, WRITE, RDSR). Its status register controls write enable (WEN), ready/busy (RDY), and block protection (BP0/BP1) states.
It supports dual voltage operation (1.8 V–5.5 V), features hardware write protection via WP pin (when WPEN = 1), and HOLD pin functionality to suspend ongoing serial transfers without resetting sequence state. Internal self-timed write cycles complete in ≤5 ms, eliminating need for external erase commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 128 Kbit (16,384 × 8), enabling compact firmware parameter storage or calibration data logging in space-constrained designs. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.7 V, 3.3 V, and 5 V logic domains without level shifting. |
| Max Clock Frequency | 20 MHz at VCC = 5.0 V - enables high-throughput configuration reads/writes in real-time control loops. |
| Write Endurance | 1 million write cycles - ensures long-term reliability in applications with frequent parameter updates (e.g., energy metering, sensor calibration). |
| Data Retention | >100 years at 25°C - guarantees persistent storage integrity across product lifecycles without refresh. |
| Page Write Size | 64 bytes - optimizes programming efficiency by reducing transaction overhead versus byte-write-only devices. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including factory automation and outdoor telemetry nodes. |
Pinout & Package
AT25128AW-10SU-1.8 is packaged in an 8-lead EIAJ SOIC (package code 8S2), 0.200" wide body, RoHS-compliant and lead-free/halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept SI data and drive SO output; high-Z SO when CS high. |
| SCK | Serial Clock | Input-only master-generated clock; defines timing for SI sampling and SO output transitions per SPI Mode 0/3. |
| SI | Serial Data Input | Accepts op-codes, addresses, and write data; ignored during HOLD or when CS is high. |
| SO | Serial Data Output | Drives read data or status bits; enters high-impedance state when CS high or HOLD active. |
| GND | Ground Reference | Primary return path for VCC current and signal references; requires low-impedance PCB connection. |
| VCC | Power Supply | Single-supply input (1.8–5.5 V); decoupling capacitor (0.1 µF) required near pin for noise immunity. |
| WP | Write Protect | Hardware lock for status register writes when WPEN = 1; prevents accidental configuration corruption. |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer (e.g., mid-read/write) without losing internal address/state; resumes on rising edge while SCK low. |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode Compatibility | Supports both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), ensuring interoperability with diverse MCU SPI peripherals. |
| Block Write Protection | Configurable via status register to protect top 1/4, top 1/2, or entire memory array - enables secure storage of boot code or security keys. |
| Low-Voltage Operation | Guaranteed functionality down to 1.8 V - enables direct integration into battery-powered IoT sensors and wearables without voltage boosters. |
| Self-Timed Write Cycle | No external erase cycle needed; internal timing completes all writes in ≤5 ms - simplifies firmware and eliminates polling complexity. |
| Industrial Temp Range | Rated −40°C to +85°C - validated for deployment in motor drives, PLC I/O modules, and automotive under-hood ECUs (non-safety-critical). |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
|
Use Scenario: Stores calibrated sensor offsets, linearization coefficients, and event logs in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with SPI interface; retains data across power cycles and supports infrequent writes. Use Value: Enables field recalibration without firmware update; 1.8 V operation extends battery life; 1M endurance supports 10+ years of daily logging. |
Use Scenario: Holds tariff tables, billing history, and tamper-event timestamps in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write protection; accessed during meter initialization and periodic data dumps. Use Value: Block protection prevents unauthorized tariff changes; >100-year retention ensures lifetime data integrity without backup power. |
| PLC I/O Module | Medical Diagnostic Device |
|
Use Scenario: Saves channel-specific gain/offset settings and calibration dates for analog input modules in programmable logic controllers. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to ARM Cortex-M host MCU via SPI; written during factory calibration and field service. Use Value: Eliminates manual potentiometer adjustment; 8S2 SOIC package fits dense PCB layouts; industrial temp rating matches enclosure requirements. |
Use Scenario: Stores patient-specific test parameters and firmware revision metadata in portable blood glucose analyzers. IC Role / Device Role / Timing Role: Low-power nonvolatile memory for critical setup data; accessed during power-up and user-configurable test modes. Use Value: 1.8 V compatibility allows direct connection to ultra-low-power microcontrollers; RoHS/lead-free compliance meets medical regulatory standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-WMN6TP | STMicroelectronics 128 Kbit SPI EEPROM; identical 8-lead SOIC (SO8) package, 1.8–5.5 V, 20 MHz max, but uses different status register bit mapping and lacks HOLD pin. | Requires firmware adaptation for status register access and no communication suspension capability - unsuitable where HOLD is used for bus arbitration. | Select when HOLD functionality is unused and STMicro ecosystem alignment is preferred. |
| BR24G128FJ-WE2 | Rohm 128 Kbit SPI EEPROM; same 8-lead TSSOP (8A2) footprint option, 1.7–5.5 V, 10 MHz max, integrated error correction (ECC), and enhanced ESD tolerance (±6 kV HBM). | Lower max clock limits throughput in high-speed logging; ECC adds resilience against soft errors but increases write latency. | Prefer in harsh ESD environments or where data integrity beyond standard EEPROM specs is mandated. |
Compared with M95128-WMN6TP and BR24G128FJ-WE2, the AT25128AW-10SU-1.8 uniquely combines HOLD pin support, consistent 20 MHz performance across voltage range, and flexible block protection - making it optimal for industrial systems requiring deterministic SPI bus management and field-updatable configuration security.
Availability
AT25128AW-10SU-1.8 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, PLC I/O modules, and medical diagnostic devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25128AW-10SU-1.8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel serial EEPROMs, delivering high-reliability nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT25128AW-10SU-1.8 belongs to Microchip's AT25xxx family of SPI EEPROMs, designed specifically for low-voltage, low-power embedded systems needing robust, pin-compatible serial memory with configurable write protection and extended data retention.
FAQ
What is the operating voltage range for the AT25128AW-10SU-1.8?
The AT25128AW-10SU-1.8 operates from 1.8 V to 5.5 V, supporting direct interface with 1.8 V, 2.7 V, 3.3 V, and 5 V logic families. This dual-range capability eliminates level shifters in mixed-voltage systems and ensures reliable read/write functionality across its full specified supply range.
Does the AT25128AW-10SU-1.8 support SPI Mode 3 (CPOL=1, CPHA=1)?
Yes, the AT25128AW-10SU-1.8 explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as confirmed in its official datasheet. This dual-mode compatibility allows seamless integration with MCUs whose SPI peripherals default to either mode without requiring hardware or firmware workarounds.
How does the HOLD pin function on the AT25128AW-10SU-1.8?
The HOLD pin on the AT25128AW-10SU-1.8 suspends ongoing SPI communication (read or write) without resetting the internal address counter or command state. When asserted low while SCK is low, it places SO in high-impedance and ignores SI inputs; resuming requires bringing HOLD high while SCK remains low.
What package type is used for the AT25128AW-10SU-1.8?
The AT25128AW-10SU-1.8 uses an 8-lead EIAJ SOIC package (package code 8S2), measuring 0.200" wide with gull-wing leads. It is RoHS-compliant, lead-free, halogen-free, and optimized for reflow soldering in automated PCB assembly processes.
Can the AT25128AW-10SU-1.8 be used in automotive applications?
The AT25128AW-10SU-1.8 is rated for industrial temperature (−40°C to +85°C) and is not qualified to AEC-Q100 automotive standards. While it may function in some under-dash or cabin applications, Microchip does not warrant or recommend the AT25128AW-10SU-1.8 for safety-critical or engine-compartment automotive use.
AT25128AW-10SU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25128AW-10SU-1.8 FAQ
1.How can I place an order for AT25128AW-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25128AW-10SU-1.8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25128AW-10SU-1.8 reliable?
The price and inventory of AT25128AW-10SU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25128AW-10SU-1.8 is usually 5 days.
3.What payment methods are accepted for AT25128AW-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25128AW-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25128AW-10SU-1.8?
AT25128AW-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25128AW-10SU-1.8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25128AW-10SU-1.8?
For technical support, including AT25128AW-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25128AW-10SU-1.8 requirements.
6.How does Aetrix verify that AT25128AW-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25128AW-10SU-1.8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25128AW-10SU-1.8 meets industry standards.
7.What is the process for return or replacement of AT25128AW-10SU-1.8?
All AT25128AW-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25128AW-10SU-1.8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25128AW-10SU-1.8 part is unused and in its original packaging.
Return procedure for AT25128AW-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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